Method of and apparatus for making bags and the like



06L 1," 1940. A PQTDEVIN ET AL 2,216,212

METHOD OF AND APPARATUS FOR MAKING BAGS AND THE LIKE Original Filed Jan. 6. 193':

3 Sheets-Sheet 1 INVENTORS 4 1/00; PA Eros/MI 4' 7? A wvz/KtR ATTORNEYS Oct. 1, 1940.

A. POTDEVIN ET AL\ METHOD OF AND APPARATUS FOR MAKING BAGS AND THE LIKE Original Filed Jan. 6, 193'! 3 Sheets-Sheet 2 INVENTOR a 191% Pb 7270M 2 A wvz nvag A TORNEY l, W40. A. POTDEVIN ET AL. 23159212 METHOD OF AND APPARATUS FOR MAKING BAGS AND THE LIKE Original Fil ed Jan. 6, 1925'! 3 Sheets-Sheet 3 Patented a. '1, 1940 a 2,216,212 METHOD OF AND APPARATUS FOR MAKING BAGS AND THE LIKE Adolph Potdevin, Garden City, and Paul Hunzlker,

Hamilton Beach, N. Y., assignors to I Potdevin Machine Company, Brooklyn, N. Y., a corporation of New York i Original application January 6, 1937, Serial No.

119,218. Divided and-this application November 13, 1937, Serial No. 174,836

.7 Claims. (01. 93-19) This invention relates to an improved method of and apparatus for making bass and the like.

This application is a division of our co-pending application Serial No. 119,218 filed January It is an object of the present invention to pro-- 'vide a method and apparatus for making bags particularly from materials such as Cellophane, Glassine and the like wherein the speed of manufacture is greatly increased and wherein there is a minimum waste of material. It is;to be 1m:-

- derstood that while we have mentioned various bag materials to which the present invention is particularly well adapted we do not wish to be limited to these materials asobviously bags can readily be made by my-imp'roved method from other materials.

Another object of the invention 'of the present application resides in the provision of a novel method and apparatus whereby the bag material is perforated'tran'sversely from edge to edge at bag length intervals while the material is in the web; we then tube the material and place the same under sudden periodic longitudinal tension to divide the tubed material along the periorations. I

' Other objects of the present invention will be manifest from the following description and the accompanying drawings: I so In the drawings: 1

Fig. 1 is a diagrammatic view illustrating an apparatus for carrying out our invention;

Fig. 2 is-a side view of the apparatus; 7 Fig. 3 -is an elevational view of the starting end .35 of the machine;

Fig. 4 is a planview; Fig. 5 is a view taken on line 5-5 of Fig. 2; and

Fig. 6 is a view taken at right angles to Fig. 5. Referring to the drawings in detail, 2 designates a roll of material from which the bags are to be made this roll being supported at the starting end of the machine. The material is passed from this roll about idler rollers 4 and 6 and past 5 paste-applying roller 8 by whichpasteis-applied to one edge of the web. The paste pot is shown at It and'the roller which supplies paste to the paste-applying roller 8 is shown at 12.

After the application of the paste, the web is passed between forwarding rollers 14 and I5 and then beneath a tensioning roller l6, and then between perforating rollers i8 and 20, under another'tensioning'roller 22 and from thence to the tubing mechanism where the web is tubed.

Each of the tensioning rollers; l6 and 22 ismounted in a frame comprising side members 24 disposed in parallel relation and secured to each other with the roller between them by rods. These side frame members are provided with rollers 28 and the assembly is mounted in end 5 track plates 30 which are rigidly mounted on the machine and which extend upwardly substantially at right angles to the face of the web. It will be evident that with this arrangement each tensioning member is free to move freely 10 on the end plates 30 vertically thereof.

It will-be equally apparent that each tensioning assembly merely yieldingly rests by gravity upon the upper face of the moving web.

As already pointed out, a tensioning device is 15' provided at each side of the perforating rollers to insure the right amount of tension on the web at the time the same is perforated to enable the perforating operation to be performed properly, While at the same time the tensioning arrangean ment being yieldingly mounted will not imposel too much tension on the web, therebyenablir'ig the web to continue its advance through the machine, without danger of premature severing of the web. 25

The perforating is only the first'step in severing the bag material into bag lengths,'and as'will be seen is performed with the .bag material in the web and without interrupting the steady advance of the web. The final step in the severing, 3o operation is performed after the web has been tubedfi The perforating step of this invention is carried out by the perforating rollers I8 and 2|] above referred to. The upper rol1er2ll is equipped 35 with a plate or knife. 34 extending lengthwise of the roller. This plate is of course of any desired shape, depending upon the shape of the line of perforations to be made in the web. The perforated line in the web is shown at 36 in 0 Fig. 4. v l A v The plate 34 may be of any suitable construction and is adapted to roll into contact with the I face of the roller' I 8 whereby the web lying 'bepanion rollers by a spring 62. This bodily move the" former plate 42. These rollers are driven about an axis which is oblique to the path of the traveling web, and tend to draw or work the material about the former plate '42, thereby materially assisting in tubing the web.

The'tubed material is now advanced between feedrollers 44, and a pair of rollers 46 and 48 driven at the same peripheral speed as the feed rollers 44 and from thence between a pair of similar rollers 56 and 52 and another pair of rollers 54. The rollers 66, 62 and the rollers 54 are overspeeded with respect to the feed rollers 44 and the rollers 46, 48 and as will be brought out hereinafter the timing of the machine is such that when the tubing in its passage through the machine reaches the point where the perforations 36 lie intermediate the rollers 46, 48 and the next set of rollers 56, .52. a longitudinal tension will be suddenly applied to the tubing to pull the tubing apart along the line of perforations therein, thereby to divide the tubing into bag lengths.

The rollers 46 and 48 'are so mounted in their bearings that the tubing is not pinched except when the severing operation is to be performed, that is to say, not until the perforations 36 in the travel of the. tubing have reached a point begigeen therollers 46, 48 and the next set of rollers The arrangement by which the rollers 46 and 66 are brought inte cooperative relation with companion rollers 48 and 52, respectively, is shown in Figs. and 6. It will be seen from these two views that the upper rollers 46 and 56 are mounted for vertical bodily movement in their respective bearings, being moved downwardly toward their companion rollers by cam 66 and moved upwardly away from their comment of the rollers is properly timed, as will be explained hereinafter. so that the rollers will bemoved downwardly toward their companion rollers when the perforations in the tubing are in proper position for the completion of the severing operation.

After the severing or dividing operation has been completed the bag lengths are forwarded by cylinders 64 to bottoming mechanism or other mechanism for finishing.

Power for driving my improved machine is taken off the main drive shaft 66.. This shaft is equipped with gear 68 for driving a train of gears 69, I6 and which drives the cylinder or rollers 54.

The overspeeded rollers'66 and 52 are driven from gear I2 on the same shaft as the gear I6, a gear I4 meshing with the gear I2 and in mesh with gear I6 on the shaft of the roller 62. This shaft also'carries a gear I8 which meshes with gear 19 on the shaft 'of the upper roller 56.

Meshing with the gear 691s gear so meshing with a gear 82. This gear 82 is mounted on shaft 84 carrying a sprocket and sprocket chain 86,

one-end of the chain I62 of a Reeves drive. The

Reeves drives two gears I64 and I66. The gear I66 drives gears I68, H6 and 2 to drive the rolls 44.

The gear II6 drives gear. H6 in mesh with Bear III on-the shaft of lower r011 48, the gear 8 meshing with gear I26 to drive the upper roll 46.

The gear 82 above referred to meshes with gear I22 to drive-gear I24 on the shaft I26 of one of the cams 66 the shaft of the other cam 66 being geared to this first mentioned shaft by gears I28.

0n the shaft with gear I I6 is a gear I I4 driving intermediate gear I36 meshing with gear I32, for

driving gear I34 meshing with gear I86 on the shaft of the wiping roller 46. Gear I84 through intermediate gear I38 and gears I46 and I42 drives the other wiping roller 88.

The perforating rollers are driven oi! the shaft 96 which carries a gear I44 meshing with gear I46 on the shaft I 48 of the roller I8. The two rollers are geared together by a pair of gears I66.

It is 'to be understood that changes may be made in the details of construction and arrangement of parts herein illustrated and described and in the arrangement of the steps of our improved methodwithin the purview of our invention.

What we claim is:

. 1. In the making of bags and the like, the combination of spaced members for applying yielding pressure to unsupported areas of an advancing web of material to tension the web, perforating rollers intermediate said spaced members for perforating the material transversely from edge to edge at bag length intervals, while the material is in the web and moving forward,

and while said spaced members are applying a yielding pressure to the web at each side of the area to be perforated.

2. In the making of bags and the like, the combination of continuously advancing means for a web of bag material, floating means for applying yielding pressure to the advancing web at spaced areas, perforating means for perforating the web transversely from edge to edge and at bag length intervals intermediate said spaced areas -while the material is in the web and moving forward, means for forming the perforated web into a tube, and tensioning rollers for dividing the tubed material into bag lengths at the perforations by imposing sudden longitudinal tension on the tube in opposed directions at each side of the perforations. i I

' 3. In the making of bags and the like, the method which comprises continuously advancing material in the wEb, tensioning the web by applying yielding pressure to unsupported areas of the advancing web at each side. of an' area to be perforated, and perforating the advancing web intermediate the areas of application of the yielding pressure and at bag length intervals.

4. In the making of bags and the like, the method which comprises continuously advancing material in the web, tensioning the web by applying yielding pressure to unsupported areas of the advancing web at each side of an area to be perforated, perforating the-advancing web intermediate the areas of application of the yielding pressure and at bag length intervals and thereafter dividing the material into bag lengths at the perforations.

5. In the making of bags and the like, the method which comprises continuously advancing material in a web, tensioning the web by applying yielding pressure to unsupported areas oi. the advancing web at each side of an area to be perforated, perforating the advancing web intermediate the areas of application of the yielding pressure and at bag length intervals tubing the perforated material and finally dividing the tubed material at the perforated areas.

6. In the making of bags and the like, the method which comprises advancing material in the web, perforating the advancing web transversely from edge to edge at bag length intervals, tensioning the web by' applying yielding pressure to the web at unsupported web areas at each side of thatpart of the web being per- 10 terated during the perforating operation, tubing it perforations.

'7. In the making of bags and the like, the combination of means for continuously advancing the bag material in the web, members for applying a yielding pressure to the material at unsupported spaced areas in the web to tension the web, perforating rollers intermediate said pressure members'for perforating the material from edge to edge and at bag length intervals, meansfor tubing the perforated web, and means for applying sudden longitudinal tension on the tube at the perforations to divide the same into bag lengths. J

ADOLPH POTDEVIN'. PAUL HUNZIKER'. 

